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Morgan told the Celtic website: "We've picked up a few injuries in recent weeks and - because of the strength in depth of the squad - we've been able to make changes with minimal effect.

"The team's on a great run at the moment, and that's down to the fact that we do have boys that are ready and waiting to play.

"Having competition in all areas of the pitch is the way it should be. When you're given the chance to come on, you're always wanting to make a positive impact.

"There's always the rule here that if you're doing well, you play. That's something players who are starting games know as well - that if they're not performing then there are boys waiting to come in. That's also great for morale."

Morgan himself was lucky not to join the Parkhead sick list after being scythed down by Hearts midfielder Peter Haring late on during Saturday's 5-0 drumbing of the Tynecastle league leaders.